Which famous calculator brand deliberately chose its logo colors based on mathematical principles related to color perception?

Mathematics and marketing might seem like distant cousins, but they intersect in fascinating ways. Consumer psychology often leverages mathematical principles to influence purchasing decisions. From the golden ratio in logo design to statistical analysis of customer demographics, numbers drive many aspects of product marketing. Test your knowledge about how mathematics influences brand identity and consumer perception in this challenging trivia question!

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Texas Instruments (red/black) - chosen because these colors have the highest contrast ratio according to mathematical vision models
Casio (blue/white) - selected because blue wavelengths mathematically stimulate cognitive processing centers
HP (blue/gold) - colors mathematically spaced to represent the golden ratio in the color spectrum
Sharp (green/black) - green chosen for its mathematical position at the center of the visible light spectrum